A full-length mezzotint portrait of Robert Manners; engraved by William Dickinson after the portrait by Joshua Reynolds and published in London in 1783.

Lady Frances Seymour. This portrait was posthumous and was commissioned by Lord Granby in memory of his son who died prematurely at the age of 24. Reynolds, writing to the Duke of Rutland's agent, describes the sadness surrounding Lord Robert's death: "...it is the general opinion that we have lost the most promising youth in the whole navy." The finished portrait shows the young naval officer leaning upon an anchor with a maritime scene in the background.